J/A+A/683/A166ivo://CDS.VizieR/J/A+A/683/A166doi:10.26093/cds/vizier.36830166CDSAlmenara J.M.Bonfils X.Bryant E.M.Jordan A.Hebrard G.Martioli E.,Correia A.C.M.Astudillo-Defru N.Cadieux C.Arnold L.Artigau E.,Bakos G.A.Barros S.C.C.Bayliss D.Bouchy F.Boue G.Brahm R.,Carmona A.Charbonneau D.Ciardi D.R.Cloutier R.Cointepas M.,Cook N.J.Cowan N.B.Delfosse X.do Nascimento J.D.Donati J.-F.,Doyon R.Forveille T.Fouque P.Gaidos E.Gilbert E.A.,Gomes Da Silva J.Hartman J.D.Hesse K.Hobson M.J.Jenkins J.M.,Kiefer F.Kostov V.B.Laskar J.Lendl M.L'Heureux A.Martins J.H.C.,Menou K.Moutou C.Murgas F.Polanski A.S.Rapetti D.Sedaghati E.,Shang H.2024-11-07T20:01:38Z2024-07-18T15:31:23ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frmultiple-starsexoplanetsradial-velocityvisible-astronomyWe report the discovery and characterisation of a giant transiting planet orbiting a nearby M3.5V dwarf (d=80.4pc, G=15.1mag, K=11.2mag, R_*_=0.358+/-0.015R_{sun}_, M_*_=0.340+/-0.009M_{sun}_). Using the photometric time series from TESS sectors 10, 36, 46, and 63 and near-infrared spectrophotometry from ExTrA, we measured a planetary radius of 0.77+/-0.03R_J_ and an orbital period of 1.52 days. With high-resolution spectroscopy taken by the CFHT/SPIRou and ESO/ESPRESSO spectrographs, we refined the host star parameters ([Fe/H]=0.27+/-0.12) and measured the mass of the planet (0.273+/-0.006M_J_). Based on these measurements, TOI-4860 b joins the small set of massive planets (>80M_E_) found around mid to late M dwarfs (<0.4R_{sun}_), providing both an interesting challenge to planet formation theory and a favourable target for further atmospheric studies with transmission spectroscopy. We identified an additional signal in the radial velocity data that we attribute to an eccentric planet candidate (e=0.66+/-0.09) with an orbital period of 427+/-7 days and a minimum mass of 1.66+/-0.26M_J_, but additional data would be needed to confirm this.2024A&A...683A.166Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/683/A166CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/683/A166https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/683/A166http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/683/A166https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/683/A166https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/683/A166http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/683/A166GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/683/A166/tablea2Radial velocity measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeBarycentric Julian date (TDB)dtime.epochdoublen_TimeNote (1)meta.notecharRVRadial velocitym/sphys.veloc;pos.heliocentricdoublee_RVRadial velocity errorm/sstat.errorfloatExpTimeExposure timestime.duration;obs.exposureintInstInstrumentmeta.id;instrchar